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Inverted organic solar cell using aluminum and sodium chloride as cathode buffer layer and preparation method thereof

A cathode buffer layer and solar cell technology, which is applied in the field of solar cells and achieves the effects of simple preparation process, abundant reserves and low cost.

Inactive Publication Date: 2017-06-27
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem: The present invention is proposed in response to the above problems. For the first time, the present invention proposes a kind of inverted organic solar cell and its preparation method, which use the compound of aluminum and sodium chloride as the cathode buffer layer, which is cheap, abundant in reserves, and non-polluting.

Method used

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  • Inverted organic solar cell using aluminum and sodium chloride as cathode buffer layer and preparation method thereof
  • Inverted organic solar cell using aluminum and sodium chloride as cathode buffer layer and preparation method thereof
  • Inverted organic solar cell using aluminum and sodium chloride as cathode buffer layer and preparation method thereof

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Effect test

Embodiment 1

[0039]Sonicate the etched and cleaned ITO conductive glass twice for 15 minutes with the lotion solution, deionized water, acetone, and ethanol in sequence. P3HT and PC 61 BM was dissolved in dichlorobenzene solution at a mass ratio of 1:1 to prepare a solution with a concentration of 17 mg / ml. The mixed solution was uniformly stirred at a temperature of 60° C. for 12 hours before use. Dry the cleaned ITO conductive glass with nitrogen and UV for 15min. Use vacuum evaporation equipment to evaporate NaCl 0.8nm on ITO, the evaporation rate is 0.05-0.08 Å / s, and the evaporation pressure environment is less than 3×10 -4 Pa, forming the cathode buffer layer. Then transfer the evaporated film to the 2 Spin-coat the stirred P3HT:PCBM mixed solution onto the cathode buffer layer at a speed of 800rpm in a high-quality hand box for 60s, then dry it naturally at room temperature for 1 hour, and then anneal at 120°C Treat for 20 minutes to form a high-quality light-absorbing layer. ...

Embodiment 2

[0041] The same method as in Example 1 is used to prepare an inverted organic solar cell. The difference from Example 1 is that Al is deposited on the ITO conductive glass in this example with a thickness of 2nm to make an inverted organic solar cell with aluminum alone as the cathode buffer layer. Solar battery. At room temperature, the J-V curve of the device is as follows figure 2 As shown, the UPS energy spectrum of the Al-modified ITO surface is as follows image 3 As shown, the surface contact angle of ITO modified by Al and the AFM image of the active layer deposited on Al are shown in Figure 5 b and 5e are shown.

Embodiment 3

[0043] Sonicate the etched and cleaned ITO conductive glass twice for 15 minutes with the lotion solution, deionized water, acetone, and ethanol in sequence. P3HT and PC 61 BM was dissolved in dichlorobenzene solution at a mass ratio of 1:1 to prepare a solution with a concentration of 17 mg / ml. The mixed solution was uniformly stirred at a temperature of 60° C. for 12 hours before use. Dry the cleaned ITO conductive glass with nitrogen and UV for 15min. Use vacuum evaporation equipment to evaporate a 2nm Al layer on the cathode ITO, the evaporation rate is 0.5-1.0 Å / s, and the evaporation pressure environment is less than 3×10 -4 Pa, and then evaporate a NaCl layer with a thickness of 0.8nm on the Al layer, the evaporation rate is 0.05-0.08 Å / s, and the evaporation pressure environment is less than 3×10 -4 Pa, form the cathode buffer layer; then transfer the evaporated sheet to the 2 Spin-coat the stirred P3HT:PCBM mixed solution onto the cathode buffer layer at a speed ...

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Abstract

The invention provides an inverted organic solar cell using aluminum and sodium chloride as a cathode buffer layer and a preparation method thereof for the first time. Compared with previous research, the inverted organic solar cell is novel in structure, simple in preparation process, low in cost and suitable for large-scale production. Al and NaCl compositely modify an ITO so as to reduce the work function of an ITO surface, improve an electrode surface contact characteristic, improve the hydrophobicity of the buffer layer surface, reduce the surface roughness of an active layer and obtain better surface morphology. An inverted structure device does not comprises an acidic hole transport material PEDOT: PSS and a low work function metal electrode so as to improve the stability of the organic solar cells. The prepared device can still maintain efficiency over 84% after 700 hours, which is 1.7 times than that of a traditional device. The two inorganic materials aluminum and sodium chloride are clean, free of pollution, rich in reserve in the natural world, low in price, and are ideal candidate materials of the cathode buffer layer of the organic solar cell.

Description

technical field [0001] The invention relates to an organic solar cell with an inverted structure, in particular to a highly stable inverted organic solar cell with inorganic materials aluminum and sodium chloride as a cathode buffer layer and a preparation method thereof, belonging to the technical field of solar cells. Background technique [0002] Under the premise of the great development of the world economy, energy shortage and environmental pollution have become the bottleneck of the sustainable development of the world economy. With the depletion of traditional energy (coal, oil, natural gas), the development and utilization of clean and renewable energy is imminent. In this context, solar energy has attracted widespread attention due to its advantages such as no pollution, large reserves, renewable, wide distribution, and easy collection. It is an ideal candidate for people to solve energy crises and environmental pollution. In the global energy strategy has a piv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/44H01L51/48B82Y30/00
CPCB82Y30/00H10K71/60H10K30/81H10K30/88H10K2102/00Y02E10/549
Inventor 张宏梅郑爽
Owner NANJING UNIV OF POSTS & TELECOMM
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